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In the town of Kitagawa, a string of perplexingly fatal accidents have claimed the lives of hundreds of people.

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Two Ultra Guard scientists, Doctors Segawa and Maeno create a new devastating weapon -- the anti-planet device they christen the R-1.

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After the Pedan's robot monster King Joe retreats, Captain Kiriyama plans to ready the Ultra Guard forces for their next attack.

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An Anglo assassin has been snuffing out various foreigners in Japan. It's learned that all the victims were secretly part of the Washington Terrestial Defense Force Scientific Team.

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A number of young ladies have fallen ill and all seem to be wearing peculiar looking metallic watches.

A monumentally deadly snowstorm engulfs the Earth. The Ultra Garrison headquarters is frozen after a mysterious monster drills underground and breaches the walls of the base.

An Ultra Squad patrol craft mysteriously crashes into a commercial plane in mid-air.

A cave-in traps Jiro, a miner, 3,000 feet below the Earth's surface. The Ultra Guard is asked to help in learning of the cause of the disruption inside the cave.

On a skydiving exercise, Amagi and Soga disappear, landing in a fog enshrouded forest in what seems like some alternate dimension.

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Upon returning from investigating a mysterious light source, Dan is called to agent Anne Yuri's quarters after a strange shadow like figure appears there.

During a birthday party for a young woman named Ruriko, a alien known as Braco walks out of the ocean, kills her dog and makes off with the girl. Anne, who is attending the party, alerts her comrades.

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An unidentified object has landed somewhere near the Kiso Mountains. Dan and Furuhashi are sent to find any wreckage, or signs of life. They find a young girl swimming in Lake Azuma as well as a spaceship nearby.

The Ultra Guard seek answers into the deaths of over two dozen people at Mt. Iwami. While there, Dan is apparently killed by an assassin using an unusual rifle.